Commands Flashcards

1
Q

pwd

A

print working directory

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2
Q

hostname

A

my computer’s network name

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3
Q

mkdir

A

make directory

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4
Q

cd

A

change directory

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5
Q

ls

A

list directory

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6
Q

rmdir

A

remove directory

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7
Q

pushd

A

push directory

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8
Q

popd

A

pop directory

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9
Q

cp

A

copy a file or directory

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10
Q

mv

A

move a file or directory

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11
Q

less

A

page through a file

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12
Q

cat

A

print the whole file

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13
Q

xargs

A

execute arguments

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14
Q

find

A

find files

find STARTDIR -name
WILDCARD -print

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15
Q

grep

A

find things inside files

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16
Q

man

A

read a manual page

17
Q

apropos

A

find what man page is appropriate

18
Q

env

A

look at your environment

19
Q

echo

A

print some arguments

20
Q

export

A

export/set a new environment variable

21
Q

exit

A

exit the shell

22
Q

sudo

A

DANGER! become super user root DANGER!

23
Q

chmod

A

change permission modifiers

24
Q

chown

A

change ownership

25
Q

touch

A

make empty file

26
Q

*

A

matches anything in a wildcard like *.txt

27
Q

$&raquo_space; $

A

The&raquo_space; takes the output of the command on the left, then appends it to the file on the right.

28
Q

$ > $

A

The > takes the output of the command on the left, then writes it to the file on the right.

29
Q

$ < $

A

The < will take and send the input from the file on the right to the program on the left.

30
Q

$ | $

A

The | takes output from the command on the left, and “pipes” it to the command on the right.